Any old outboard experts here?

torosapo

I have an old Sears 3.5 horse outboard and I am not sure what the gas/oil mix should be. Any help would be appreciated.

tskry

I run 40:1 in my old sea-king,, It smokes a little but its not fouling the plugs,
You can try it a little leaner if you start fouling,
I always thought that a little too much oil in the gas is better than too little.

wpage

Agreed. Its the standard for most 40:1 mix.

torosapo

Thanks guys, I wasn't sure and didn't want to burn it up running too lean.

torosapo

BTW does anyone know who made the older Sears boat motors?

wpage

It is probably a Clinton... Try this link for info,,,
http://www.cheapoldboats.com/old_motor_parts.html

torosapo

Thanks

MMOMEQ-55

A little smoke is good. If she ain't a smoking then she don't have enough oil in her.

deerslayer3

One solution may be using the synthetic 2 stroke oil from the lawn & garden section. One packet mixes to one gallon. This will do ALL ratios. Oregan, Lawnboy, and another is some I see at my local Ace Hardware. I use them for my chainsaw, trimmer, 78' Lawnboy push mower ,and a 63' Evinrude outboard.